Yes, this is acceptable from what I know (had multiple of those reviewed by staff here in the Forums, and I myself do regulary submit them and get them accepted.)
You understood well that Hike trails are acceptable wayspots. Many don’t, and I think it’s great to ask this question here.
Hike trail signs are considered permanent and are good Anchorpoints for Wayspots. just like Signs of a Playground. So theres no issue in having those.
Also Hike Trails are very long structures, it would be quite odd to only have one on the starting point and end point of the trail wich could be dozens or hundreds of kilometres apart.
In my opinion, it also makes for a great play experience to have multiple Wayspots on a Hike Trail so you can anjoy a hike and play Pokemon Go enjoyably.
Furthermore, Hike trails are great for rural Areas to have Play Areas that encourage excercise in groups and have a good amount of Wayspots.
Niantic has never after Hiketrails were included stated officially how many there can be on a Hike trail, but from their Forum responses and Community discussion here in the Forums, it seems that a wayspot every 200 metres for the same trail is a good rule of thumb, while theres no definitve max or min amount of Wayspots a Hike trail can have.
So does that mean every Hike trail sign is an Auto-Yes? No, it doesn’t.
Does the trail have some kind of recreational value (like beeing a one-day-trip to a touristic destination and back) or is it just public infrastructure? Is the trail reconizeable on the sign (specific trail signs should be proven with a Link) so it can be verified that this an actual sign of a hike trail, and, if in an Area without streetview or if the sign isn’t visible there for some reason) a Map of the Hike trail wich can prove that the trail leads along the assignet wayspot position. I include that every time for safety.
When it comes to rating, I say they’re still “hit and miss”, but more recently the majority of them comes back accepted, so when it comes to rating, I’d assume you would get more disagreements than agreements by rejecting those. By the rules of Niantic as far as I understand them, they’re absolutely safe to accept, and get accepted in 95% of cases by the appeals team. So I reccomend to accept them for as long as you can verify as described.
Also, when reviewing always try to stick the criteria and use you best knowledge and judgement.
For gathering, it can be helpful to gather infos on the Forums and talk to other wayfinders.
I don’t advise to decide on your assumption of how the community might decide on a wayspot, but on your own judgement and knowledge. That leads to good results for me all the way and is what i was recommended to do from the start by the people who brought me into wayfarer.
Edit: Didn’t see you already got your answer, anyways, im keeping this here for anyone who might be interested 